Maybe it's just me, but I sometimes feel like each yom tov has their own distinct go-to color palette.
Here's a breakdown of how I see each yom tov in color and what color psychology has to say about each one. You can check out a bunch of my theories on why each color is associated with each yom tov at the FiS Learning Center.
https://www.frocksinstock.com/post/jewish-yomim-tovim-from-a-graphic-designer